Circuit question

Thread Starter

ftwpmg

Joined Nov 12, 2019
1
Been sitting on a couple of questions and just cant seen to figure them out. If someone could explain them that would be great20191112_221744.jpg20191112_221015.jpg20191112_220821.jpg
 

Zeeus

Joined Apr 17, 2019
468
Hi... Maybe me too don't understand but think about this :

Perhaps can assume L2 is 0 volts and L1 is 120V

In 1st image, circuit 4, after closing switch, the voltage at point C with respect to L2 (L2 is 0v) is 0v....So there is no voltage drop across the bulb

But if there is no voltage drop across the bulb then how will it turn on?

If there is no voltage drop then can assume current is not flowing?

but if the switch is really closed then why should current not flow?
 

jpanhalt

Joined Jan 18, 2008
8,114
First question on circuit #4. Is the circled response your tentative response or what is presumed to be the correct answer.

If it is your answer, then explain how a lamp will light with 0 voltage across its terminals? (Are responses B and c different?) Is there any alternative response that explains the observation?
 

WBahn

Joined Mar 31, 2012
24,854
Been sitting on a couple of questions and just cant seen to figure them out. If someone could explain them that would be great
For each question, determine what you believe the measured voltage will be for each circuit and explain your reasoning. Then we can help you understand whether your reasoning is sound or not and how to improve it, if needed.
 
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